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Marquise|Lab Grown|IGI

1.22ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG787621055

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG787621055

Diamond specifications and retailer prices

From £360 GBP
As of November 4, 2026
Save £1,351 GBP (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,782 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.22ct lab-grown marquise diamond

This 1.22ct lab-grown marquise sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG787621055 or 787621055. Listed at 14 retailers as of November 4, 2026, with a 375% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.22
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787621055
Dimensions10.89 × 5.59 × 3.49 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.89 mm5.59 mm1.22 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787621055
Side View
Table 60.0%Crown 35.1°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,782 GBP|Low: £360 GBP|High: £2,430 GBP|Avg: £1,149 GBP|-1.4%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 5, 2026
Retailer 8£360 GBP
Retailer 10£444 GBP
Retailer 2£557 GBP
Retailer 4£629 GBP
Retailer 5£645 GBP
Retailer 12£716 GBP
Retailer 3£729 GBP
Retailer 14£817 GBP
Retailer 6£841 GBP
Retailer 13£1,040 GBP
Retailer 11£1,201 GBP
Retailer 7£1,253 GBP
Retailer 9£1,711 GBP
Rare Carat£1,782 GBP

42 data points across 14 retailers

14 retailers£360 GBP to £1,711 GBP

A
Cheapest Retailer
-
£360 GBP
A
Retailer 2
-
£444 GBP
View
A
Retailer 3
-
£557 GBP
View
B+
Retailer 4
-
£629 GBP
View
B+
Retailer 5
-
£645 GBP
View
B+
Retailer 6
-
£716 GBP
View
B+
Retailer 7
-
£729 GBP
View
B+
Retailer 8
-
£817 GBP
View
B+
Retailer 9
-
£841 GBP
View
B+
Retailer 10
-
£1,040 GBP
View
B+
Retailer 11
-
£1,201 GBP
View
B
Retailer 12
-
£1,253 GBP
View
B
Retailer 13
-
£1,711 GBP
View
Most Expensive
Rare Carat
54665_l_787621055 · Oct 28
£1,782 GBP
$2,405 USD
View
Price last confirmed 7 days ago
13 more retailers have this diamond
Prices start from £360 GBPSave up to £1,351 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.22ct Marquise
£360 GBP